Antenna



FIG. 1 is a perspective view of an antenna showing my design;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof, opposite that shown in FIG. 2;

FIG. 4 is another side view thereof, 90 degrees offset from that shown in FIG. 2;

FIG. 5 is another side view thereof, opposite that shown in FIG. 4;

FIG. 6 is a top view of the antenna; and,

FIG. 7 is a bottom view thereof.

The broken lines in the drawings illustrate portions of the antenna which form no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 